The Shindaiwa A021003281 Carburetor Diaphragm supports fuel metering in compatible leaf blower and vacuum carburetors. It flexes with pressure changes inside the carburetor to help regulate fuel delivery to the engine. Proper diaphragm function supports consistent fuel flow and reliable engine operation during outdoor cleanup tasks. Replacing a hardened, torn, or worn diaphragm can he... https://www.wholetoolbox.com/shindaiwa-a021003281-leaf-blower-vacuum-carburetor-diaphragm-wyk-357/A021003281.html